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<h2>Determining how the target of a selector displays when no data exists 
 </h2>
<p>A panel displays a Grid/Graph with Call Center and Region as the attributes. 
 The panel also contains a selector that lists Call Centers and targets 
 the Grid/Graph. Outside of the panel stack, another selector lists Regions. 
 Its target is the panel stack and therefore the selector on that panel 
 as well. Refer to these selectors as the regional selector and the call 
 center selector.</p>
<p>In Interactive Mode in MicroStrategy Web, choose Central in the regional 
 selector. The first Call Center, Milwaukee, is displayed in the Grid/Graph, 
 as shown below in Interactive Mode. Notice that the call center selector 
 automatically shows Milwaukee as selected. </p>
<p><img src="images/Selector_update_cm.gif" x-maintain-ratio="TRUE" width="391px" height="180px" border="0" class="img_whs1"></p>
<p>Select Fargo in the call center selector, and the Grid/Graph is updated, 
 as shown below. </p>
<p><img src="images/Selector_update_cf.gif" x-maintain-ratio="TRUE" width="378px" height="174px" border="0" class="img_whs2"></p>
<p>Select Northeast in the regional selector. The Grid/Graph displays a 
 message that no data is returned, and no call center is selected in the 
 call center selector. The Grid/Graph tries to return data that is both 
 Region = Northeast and Call Center = Fargo, but no such data exists, as 
 shown below.</p>
<p><img src="images/Selector_update_ne.gif" x-maintain-ratio="TRUE" width="383px" height="176px" border="0" class="img_whs3"></p>
<p>To automatically display the first Call Center in the new Region instead, 
 allow the call center selector to be updated by other selectors. In the 
 previous scenario, when you choose Northeast, Boston is now displayed 
 in the Grid/Graph, as shown below. </p>
<p><img src="images/Selector_update_nb.gif" x-maintain-ratio="TRUE" width="379px" height="175px" border="0" class="img_whs4"></p>
<p>Before you can allow a selector to be updated by other selectors, the 
 following requirements must be met:</p>
<ul>
<li class=p-TopicTextBulleted><p class=TopicTextBulleted>The selector 
 that you want to be automatically updated must be on a panel. </p></li>
	
<li class=p-TopicTextBulleted><p class=TopicTextBulleted>The selector 
 that updates the first selector must target the panel stack.</p></li>
</ul>
<p><span style="font-weight: bold;"><B>Note</B></span>: You can create cascading 
 selectors, where one selector updates another, and the second updates 
 a third. To ensure that a selection in one selector affects all its targets, 
 you must define the selectors in the order of the attributes’ hierarchy. 
 For an example, see 
<a href="GG_controlling_GG.htm">Enabling a Grid/Graph 
 to control another Grid/Graph</a>.</p>
<h2>To Determine how the target of a selector displays when no data exists 
 </h2>
<ol type="1" class="whs5">
	
<li class=p><p>Open the document in <span style="font-weight: bold;"><B>Design 
 </B></span>or <span style="font-weight: bold;"><B>Editable Mode</B></span>. </p></li>
	
<li class=p><p>Right-click the selector to modify and select <span 
 style="font-weight: bold;"><B>Properties and Formatting</B></span>. The Properties 
 and Formatting dialog box opens.</p></li>
	
<li class=p><p>From the left, choose <span style="font-weight: bold;"><B>Selector</B></span>.</p></li>
	
<li class=p><p>The <span style="font-weight: bold;"><B>Automatically update 
 when there is no data for the current selection </B></span>&nbsp;check 
 box determines how the target displays when no data exists:</p></li>
	<ul>
<li style="list-style: disc;" type=disc class=p><p>To display a 
 message that no data is returned, clear the check box.</p></li>
		
<li style="list-style: disc;" type=disc class=p><p><span>To display 
 an item, select the check box.</span></p></li>
	</ul>
	
<li class=p><p class="whs6">Click <span style="font-weight: bold;"><B>OK</B></span> 
 to apply the changes.</p></li>
</ol>
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